ASoC: SOF: IPC: Add new IPC command to free trace DMA

ASoC: SOF: IPC: Add new IPC command to free trace DMA

Add a new SOF_IPC_TRACE_DMA_FREE IPC command to stop and free trace DMA
in the FW.

Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Link: https://lore.kernel.org/r/20211102101019.14037-2-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>